Adding attachment for type-writing machine.



W. WRIGHT. ADDING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLIUA TION FILED NOV. 8, 1905.

3 SHEETS-8HEET 1.

WW I

Patented Apr. 28, 1914.

W. WRIGHT.

ADDING ATTACHMENT FOR TYPE WRITING MACHINES.

APPLICATION FILED NOV. 8, 1905.

1,095,060. Patented Apr. 28, 1914.

3 SHEETSSHEET 2.

W. WRIGHT. ADDING ATTACHMENT FOB TYPE WRITING MACHINES.

APPLICATION FILED NOV. 8, 1905.

Patented Apr; 28, 1914.

3 SHEETS-$112111 3.

'' tachment for'typ'ewriting machines, and one mechanism. To do this, Iprovide an abacommercial totalizers (each of which comrow columns,

all of these wheels by means of carry-overl UNITED STATES PATENT OFFICE.

WALTER WRIGHT, OF SAN FRANCISCO, CALIFORNIA. ASSIGNOR, BY MESNE'ASSIGN-MENTS, TO UN DERWOOD COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A

CORPORATION OF NEW YORK.

ADDING ATTACHMENT FOR TYPE-WRITIN G MACHINES Specification of'LettersPatent. Patented ADI 28, 1914;.

Application filed November 8, 1905. Serial No. 286,368

T 0 all whom it may concern:

Be it known that I, lVAL'rnn \Vmori'r, a citizen of the United States,residin at San Francisco, in the county of- San Francisco andfState ofCalifornia, have invented certain newand useful Improvements in AddingAttachments for 'Iype-\Vriting Machines, of which the following is aspecification.

This invention relates to an? adding atof the objects 0 the invention isto provide a cheap, simple and compact device of this character whichcan be attached to any of the standard forms of typewriting machines. Inthis class ofmachines, by depressing the numeral keys for the purpose ofprinting the numerals on the work-sheet, the numbers so printed 'on eachline of writin are mechani cally added to the numbers t at have beenprinted on the preceding lines of writing; and the total of all ofthelines so written maybe read-off at any time.

Itzis often desired to write several columns of figures sideiby sideupon the same work-sheet, and to be able to read off the totals of theseSeveral columns whenever desired. p

It is an object of my invention to produce a machine by which it isfeasible to write several columns at any selected places on thework-sheet, and also add them. I have provided a device whereby not onlymay a single ordinary wide column be writteniat any place on thework-sheet and the total thereof secured, but also whereby several suchcolumns may be written side by side where, desired, and their resultssecured; and wide columns may alternate with narand even be written veryon the work-sheet, and still means of the adding closely together theresults secured by cus-like set of computing wheels, which aresufficiently numerous" to permit apportionment of the set into aplurality of standard prises at least eleven computing wheels, includingtwo wheels for decimals). These wheels preferably occupy the entirewriting space of the standard typewriter, that is, there may be onewheel for each letter-feeding movement of the typewriter. I connectmechanism into an uninterrupted train, whereby at the will of theoperator numerous narrow columns, slightly separated one from another,may atone time be located at anyseleeted points along the run' of thecarriage, and several wide columns may be located along said run atanother time, and many alternate wide and narrow columns may be. locatedat still. another time. In other words, the-device is adapted.- foruniversal location of the columns, regardless of the size of an column,

A further 0 ject is to provide an attachment very convenient formakingout bills 'or statements in which it; is necessary to e typewriterthe character of the item can written and the amount set oppositethereto, and so on for a-number of items,

specify the nature of t be each. item, for with and after all the itemshave thus been set down, thenby means of the adding attach ment, thetotalof such itemsis immediately known and can be. read off andwrittendown.

A further object of the invention is to provide an attachment which willnot interfere in any way with the ordinary operation of the keys andwith which it requires no more appreciable exertion on the part of theoperator. to press the'numeral keys when intending to add the figuressowritten than when not, and in which the adding attachment canbe broughtinto use sim ly by means of operating a control or shift key providedfor that purpose. The attach ment may therefore be used or an timeas'may be desired.

ii the accompanying'drawings, Figure 1 is a front elevation of atypewriting machine having my attachment secured thereto; Fig. 2 is abroken front view of a portion of the attachment; Fig. '3 is a .similarview of the same in a difl'erent position from that of Fig. 2; Fig. 4 isa broken view of the mechanism for winding the spring; Fig. 5 is abroken plan view upon an enlarged scale of the end of the typewritingmachine to which the attachment is.ap-,

plied; Fig. 6 is a broken plan view of the carriage showing the racks ina different position from that of Fig; 5; Fig. 7 is a detail erspectiveview of the shift mechanism for iiringing the attachment into operation;Fig. 8 is an end view of the attachment: Fig 9 is a vertical section-ofa portion of from turning, but as soon as, by the movethe attachmentbroken away; Fig. 10 is a broken detail view of a portion of the mainshaft; Fig. 11 is a detail cross sectional view of the shaft; Fig. I2 isan enlarged broken front view-of the counting wheels on the shaft; Fig.13 is a cross section thereof; Fig. 14 is a cross sectionof amodification.

Referring to the drawings, 1 represents the frame of a typewritingmachine, which may be of any standard construction, but, for the purposeof illustration is herein shown as an Underwood machine. Upon the righthand side of the frame is secured by screws 2 an extension or arm 3,which carries at its end a slideway 4 for a carriage 5. Said carriagemoves in a direction longitudinally of. the machine and supportstwo-racks, a fixed rack 6 and a movable rack 7, which has a rib 8sliding in a guideway in the carriage. The carriage moves only thedistance between the centers of said racks, and by its movements bringsone or the other :of said racks into engagement with agear wheel 9 upona shaft 10, said shaft rotating in a bearing 11 secured upon said.armand also in a bearing 12 upon the end of an arm 13 extending outwardfrom the other end of the typewriter frame, to which it is secured.\Vhen the gear wheel 9 is in engagement with the fixed rack 6 it isthereby prevented ment of the carriage, it.is brought into engagementwith the movable rack.7, said gear wheel is no longer held back, and canrevolve. This it does under the action of a coiled spring l t secured atits inner end to a fixed stud shaft 15 and at its outer end to a barrel16 having a gear wheel-17 which meshes with a gear wheel 18 secured onother end of the shaft 10. This spring 14 is provided with the usualratchet and can be wound up at intervals by a key or handle to providesufficient power for the operation of the adding attachment. The motioncommunicated to the'shaft 10 by the sprin 14 causes the gear wheel" 9 torevolve, and thereby moves forward the movable rack, and the extent ofthis movement is variably limited from the same source as that whichinitiates the movement of the carriage.-

When it is desired to use the adding attachment, the operator depressesa. shiftkey 20, which swings a bell crank lever 21 which is attached tothe end of a bar 22, said bar at the other end ofb'eing guided by a slot23. Through said bar passes, for each numeral key, rod 24. dependingfrom a bell crank lever 25. 'Each rod is' bent at the lower end to forma hook-26 adapted to enter an eye 27 in a loop 28 secured to the bar 29of thenumeral key. When said bar 22 is shifted to the left bythedepression of the shift key,this movement brings all of said hooks 26into.

to the right and withdraws said hooks out -riage and thus also moves thecarriage to the ;ing to 24 is also depressed. As soon asthc shift key isreleased the bell crank lever 21 is returned to its original position bythe action of a spring 30, and this returns saidbar 22 of said eyes, sothat the adding device is no longer operative. But so long as the deviceis operative by pressure upon the shift key, the depression of anynumeral key rocks the corresponding bell crank lever 25, so that theupwardly extending member thereof swings to the left. The top ofsaidmember is connected by a link 32 with the top of an idler arm 33extending upward from a. sleeve 3 on a stud 35 extending horizontallyfrom the frame 36 secured upon the end of the typewriter frame, saidsleeve ,having also another arm 37 connected by a link 38 loosely with avertical lever 40. There are nine of these vertical levers 40,corresponding to the nine numeral keys on the typewriter, and arrangedat regularly increasing distances from the slideway of the carriage.When any lever is thus moved to the left, it presses against anextension 41. secured to the carthe left, bringing the movable rack intoengagement with the gear wheel, which permits the gear wheel to revolveand move the movable rack forward. The forward motion of said rack islimited by the next lever 40 to that which has shifted thecarriage,which, as well as the other levers corresponding to highernumbers, have remained stationary, so that the extent. of this motiondepends 1 upon the distance of said lever from the carriage slideway.For( instance, for the numeral 1 for which the lever 40 is the nearestto the carriage slide, therack is immediately stopped by the next levercorrespondin to the numeral 2' after moving forward the distance of onlyone tooth. For

the numeral 2 whose lever 40 isone step farther from the carriage slidethe rack is stopped after moving through the distance 11o of two teeth,and so on. The movement of anylever 40 causes all the levers 40correspohding to lower numbers to be.--als'o moved, for the lever 40 hasa small larm'42 rojecting rearward along the back .of the f ever 40corresponding to the ,next lower number, so that the movement to theleftof" any lever carries with it the lever correspond the next lowernumber, and so'all the levers corresponding to the lower numbers 12'!are simultaneously moved with the mo'vement ofthe lever corresponding tothe-se'- lected number. It will thus be seen that the 3 amount ofrevolution permitted to the gear wheel 9 and to the shaft 1O dependsupon the numeral which is depressed. As soon. as pressure is removedfrom the numeral key,

so that it rises again, the carriage is returned to its originalposition by means of a spring 43 returningalso the levers 40. This moves186 .width, there are about seventy.

the movable rack 7 from underneath the gear wheel 9 and brings the fixedrack (3 underneath said gear wheel and thereby locks the gear whee],preventing any further movement until another numeral key is depressed.Upon being released from engagement with the gear wheel, the movablerack is innuediatcly returned to its original position by means of aspring 44.

The revoluble movement of the gear wheel 5) is utilized to add rows offigures in the following manner.. Upon the typewriter carriage 45 aresecured hangers or arms 46 which extend forward and downward through thelower ends of which the shaft 10 passes, which, between said ends,carries a number of counting or computing wheels 47, there being onesuch counting wheel for each space on the typewriting machine, of which,for a machine of ordinary These counting wheels therefore move with thetypewriter carriage.

The shaft carries at the center a toothed master wheel 48 having tenteeth corresponding to the ten digit-s, said teeth being adapted toenter. corresponding recesses formed in the hub 49 of an one of theseries of counting or computing whee-ls. These recesses form inwardlyextending teeth 50, the ends of the teeth being substantially in contactwith the shaft-10. By the revoluble movement imparted to the shaft fromthe depression of a key by the release of the .lnovablerack in themanner already de scribed, that counting wheel 47, which, by themovement of thetypewriter carriage, has been brought to the center ofthe machine, and is therefore in operative engagement. with the toothedwheel 48 on the shaft, and moved through acorrespomlingangle. Thisappears by the advance of the numerals 51 formed upon the miter surfaceof the counting wheel.

.The mechanism above described for de{ termining the extent to which thecounting or'eomputing wheels will be rotated may be tegned a. valuatingmechanism in that itcotirdinates the rotation of each computing wheel tocorrespond in extent to the numerical value of the numeral key actuatedat any particular instant. It will be noted that this mechanism islocated oil to one side alongside the frame of the machine out of thewayof the typewritingmechanism and is joined to the latter by bareconnections.

It is necessary to provide that after anyi counting wheel has been movedpast the number 9, one tenth of a revolution should be imparted to thenext-counting wheel on th left. For this purpose each counting orcon'iputing wheel has a linger which extends outward from the back LIleft hand surface of the counting wheel into an annu- 351a! recess 53formed in the next counting :past the! tooth 59 upon mon mechanism for.this move the counters on the shaft 10. \Vhen any countingwheel hasmoved through a" complete revolution so that it, is necessary to advancethe next counting wheel to the leftthrough one-tenth of a ievolution,said finger engages said toot-h andcauses the arm to move with thefirstcounting wheel through one-tenth of a revolution. At the beginning ofsuch movement a pin 58, carried by said arm, extends tothe left into thecorner behind a tooth 59 of an internal ratchet wheel formed on thecounter, so that, when said arm 55 has moved with the first. countingwheel through one-tenth of a revo lution, this pin 58, engaging theratchet tooth, causes the counting wheel on the left to move-alsothrough, one-tenth of'a revolution. A further movement of thefirstcounting wheel will cause the finger 52 to escape the thin-metalarm, releasing the same without advancing the second counting wheel anyfarther, and; as soon as released, a. spring 60 returns said armto itsoriginal position.' To. hold all the counting wheels stationary exce tthose which are being positively advanc by the toothed wheel, there isprovided for each .count-ing wheel a brake 62 formed of a tal plate.bearing against the side of the counting wheel. This plate is secured toa sleeve 63 pinned to the shaft. v

In the modification shown in Fig. 14, in-

stead of the shaft being'jprovided with a spring me gear wheel it isformed with adecagonal'enlarged portion.64 which fits in successionintocorrespondingly shaped inner surfaces in the hub of the countingiwheels.2;-

In order to re-set the counting wheels to zero the shield 66 is raisedand thyare reset by hand. However, anysuitablemes chanieal re-settingmechanism may housed in conjunction with this invention. j

It will be understood that the' meeha nisin by which any counting wheelis advanced through one-tenth of a revolution by rezb son of thecomplete'revolution of the-preceding counting wheel, is notlanessential.

part oft-he presentinvention, as any, compurpose may be used. I claim 1.In an apparatus of the character described, the combination with atypewriting machine, of a shaft, computing. wheelsmovable thereon, saidshaft having a. part. adapted to engage any-computing wheel and turn thesame, meansfor turning said shaft, and means forlimiting the extent ofrota tion of said shaft, comprisinga gear wheel on the shaft and acarriage, said carriage having a fixed rack and a movable rack arrangedin alternate positions of the carriage to engage said gear wheel, andmeans for variably limiting the movement of the movable rack whenbrought into engagement with the gear wheel.

2. In combination with means for rotating a shaft, means for variablylimiting the extent of rotation thereof comprising a gear wheel on theshaft, a carriage sliding in a direction parallel with the shaft, andhaving fixed and movable racks adapted in' alternate positions of thecarriage to engage said gear wheel, and means for variably limiting theextent of movement of the movable rack,

when so engaging said gear wheel.

' forlimiting the extent of movement of the 3. In combination with ashaft and means for rotating the same, a gear wheel rotating with theshaft, a carriage moving parallel with the axis of the gear wheel andhaving a fixed rack and a movable rack, and; means ment of the movablerack corresponding with the lever so operated. Y

5. In combination with a computing wheel, a shaft for advancing thesame,

means for rotating said shaft, and. means for permitting sald shaft torotate .while limitingthe extent of rotation thereof, coinprising a gearwheel rotating with the shaft, a carriage moving parallel with the axisof the gear wheel, fixed and movable racks on said carriage, a series oflevers 'for shifting said carriage to move the fixed rack out ofengagementwith the gear wheel and the movable rack into engagementtherewith, means controlled at the will of the operator for connectingsaid levers with typewriter keys, and .means forvariably arresting themovement of'the movable rack corresponding with thelever so operated.

6. In combination 'with a computing wheel, a shaft for advancing, thesame, means for rotating said shaft, and means for permitting sald shaftto rotate while limiting the extent of rotation thereof, comprising agear wheel rotating with the shaft, a" carriage moving parallel with theaxis of the gear wheel, fixed and movable racks on said carriage, and aseries of levers for shifting said carriage to move the fixed rack outof engagement with the gear wheel and the movable rack into engagementtherewith, each lever shifting with it thelever corresponding to a lowernumber, the next higher unshifted lever acting as a stop for the movablerack.

7. In a computing machine, the combination with keys, of a computingmechanism controlled thereby, including an eseapement wheel and fixedand movable racks, a powerdriven actuator or master wheel to turn thenumber wheels, and key-operated members in a group comprising one to bemoved directly and also arranged to be moved by another, and havingmeans to move the fixed and movable racks relatively to the eseapementwheel and. also determining the extent of movement of the movable rackby means of the unmoved members.

8. In a combined writing and adding machine, the combination with aletter-feeding carriage, of a computing mechanism comprising anabacus-like set of computing wheels which are sufficiently numerous topermit apportionment of the set into a plurality of standard commercialtotalizers, each whereof comprises at least eleven computing wheels anda carry-over mechanism connecting all of said computing wheels into anuninterrupted train, whereby, at the will of the operator, numerousnarrow columns, slightly separated one from another, may at one time belocated at any selected points along the run of the carriage, andseveral wide columns may be located along said run at another time.

9. In a combined writing and adding machine, the combination with aletter-feeding carriage, of a computing mechanism com prising anabacus-like set of computing wheels which are sufliciently numerous topermit apportionment of the set into a plurality of standard commercialtotalizers, each whereof comprises at least eleven computing wheels anda carry-over mechanism connecting all of said computing wheels into anuninterrupted train, whereby, at the will of the operator, numerousnarrow columns slightly separated one from another, may at one time belocated at any selected pbints along the run of the carriage and-severalwide columns may be located along said run at another time said setcomprising also a much greater number of connected computing wheels thannecessary to a plurality of commercial totalizers, to permit location ofthe adding columns at difierent positions along the run-of saidcarriage.

- 10. A computing mechanism comprising an abacus-like set of computingwheels,

which are sufiiciently numerous to permit apportionment of the set intoa plurality of standard commercial totalizers, each whereof comprises atleast eleven computing wheels, whereby, at the will of the operator,

numerous narrow columns, slightly separated one from another, n y at onetime be located at any selected points, and several wide columns may belocated at another time, and tens-carrying devices extending throughoutthe entire set to enable tens to be carried between any adjoining wheelsin the set. r

11. The combination with a gang of computing wheels, of a master wheelfor driving said-computing wheels,and an escapement mechanism for saidmaster wheel including a gear, fixed and movable racks meshing with saidgear to determine the silencing or activity of'said master wheel, andshifting means for efi'eetiug a relative movement between said racks andsaid gear to alternatively bring about a meshing of said ear with eithersaid fixed rack or said more le rack.

12. The combination with a gang of computing wheels, of a master wheelfor driving said computing wheels, and an eseapement mechanism for saidmaster wheel. including a gear, a fixed rack, a movable rack, shiftingmeans for eti'ecting a relative movement between said gear and saidracks'to alternatively bring about a meshing of said gear with eithersaid fixed rack or said movable rack, and means for determining theextent of movement of said movable rack when meshing with said ear..

13. The combination with a gang of computing wheels, of .a master wheelfor driving said computing wheels, and an escapement mechanism forcontrolling the movementand extent of movement of said master 'wheel,comprising a gear, fixed and movable I gear, so as to determine therotation and non-rotation of said gear and said master wheel.

14. The combination with a gang of computing wheels, of a master wheelfor driving said computing wheels, and indexing or valuating means fordetermining the extent of rotation of said master wheel, said valuatingmeans including a gear, a rack meshing with said gear, and a series offingers located in the path of movement of said rack to obstruct themovement of said rack at different points corresponding to differentdigits.

15. The combination with a gang of computing wheels, ofamaster wheel fordrivm said computing wheels, indexing or valualing means for determiningthe extent of rotation of said master wheel, said valu utiug meansincluding a gear, a rack meshing with said gear. and a series of fingerslocated in the path of niovenu-ut of said rack to obstruct the movementof said rack at different points corresponding to different digits, anda series of keys, one individual to each of said fingers for moving itscorresponding finger and all preceding fingers out of the path of saidrack.

16. The combinatienwith a gang of computing wheels, of a master wheelfor rotating said computing wheels, a motor for during said masterwheel, and a valnating or indexing mechanism for determining the extentof rotation of said master wheel by.

said motor, said valuating mechanism ineluding a gear, a drivable membermeshable nism for determining the extent of rotation of said masterwheel by said motor, said valuating ,mechanism including a gear, adrivable member meshable with 'said gear, and a series of interferingmembers located in the path of movement of said drivable member toobstruct the movementof said drivable member at various points, and aseries of numeral keys one individual to each of said interferingmembers to shiftthem between interfering and non-interfering positions.7

18. The combination with a gang of coniputing wheels, of a master wheelfor rotating said computing wheels, :1 motor for driving said masterwheel, a valuating mechanism for determining the extent of rotation ofsaid master wheel by said motor, said valuating mechanism including agear, a drivable member meshable with said gear and a series ofinterfering members located in the path of movement of said drivable,member to obstruct the movement of said drivable member at variouspoints, and a series of numeral keys, one individual to each of saidinterfering members to shift them between interfering andnon-interfering positions, said interfering members having means toremove all preceding interfering members outof the path of said drivablemember.

19. The combination with a typewritingshaft extending from right to leftof the typewriting machine and beyond the sides thereof, motive meansfor said master wheel shaft connected thereto at'one extremity thereofand atone side of the typewritingmachine, and an escapement mechanismfor said masterwheel shaft connected thereto at the other extremity ofsaid shaft and located at the other side of said typewriting machine;said computing wheels mounted to travel between said motive means andsaid across the machine at the front thereof and above the keyboard, anda master-wheel to engage and drivefsaid' computing, wheels, thecombination with an indeinngmechanism for said master-Wheel; saidindexing mechanism mounted at one side of the typewriter at the frontthereof and connected to said master-wheel, ofbell cranks connected tosaid keys, and links-extending fronf'said bell V witnesses.

cranks across the machine to connect with said indexing mechanism.

21. In a computing machine, a master wheel shaft prolonged ateach andbeyond its master wheel and the corresponding set f computing Wheels,means at oneend of t 1e shaft to operate it by power, anuescapementmechanism at the other end of'the shaft, key-links extending to the endof the shaft that extends to the escapement mechanism, a part 40 to formpart of the escapement mechanism, and means to enable the key-links todrive the part40 variably.

- .In witness whereof I have hereunto set my hand in the presence of twosubscribing.

WALTER WRIGHT.

Witnesses:

E. \NOODWARD, BESSIE Gonrmnnn.

- Copies of this patent may be obtained for five cents each, byaddressing the Commissioner ot'fate'nts, Washington, D. C.

